Finding the Fourth Proportional to 55,171.50, 76,137.89 and 30,021

Step by Step Solution

1. Step 1: Write the proportion equation
   55,171.50 : 76,137.89 = 30,021 : x
2. Step 2: Convert to fraction form
   55,171.50/76,137.89 = 30,021/x
3. Step 3: Cross multiply
   55,171.50x = 76,137.89 × 30,021
4. Step 4: Simplify right side
   55,171.50x = 2,285,735,445.59
5. Step 5: Solve for x
   x = 2,285,735,445.59/55,171.50
6. Step 6: Final answer
   x = 41,429.64